It's a minor thing, but in the anime, when Vivio, Rio, and Corona show off their test scores to Nanoha & Fate, Raising Heart floats up and uses its solid-magic 'wings' to pat the girls' heads in congratulations.
Einhart's reasoning behind naming her device Asteon: It was the name Claus and Olivie had chosen for a leopard kit who was stillborn. Also a bit of a Tear Jerker.
Nanoha congratulating an unconcious Vivio after her fight with Miura. Vivio might have lost the fight, but she gave it her all, and to Nanoha, that was more than enough.